Sour Cream
I have found it seems like a lot of it staying closed depends on where the "seam" ends up. I've glued and crimped and still had them popping open. I ended up using staples on the ends to keep some of them closed. But some stayed closed on their own. Like I said, I think it depends on where the seam ended up.
Also, would a lighter weight paper work better? I don't know...but it's a thought I considered.
Jane
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